How do I check for null or empty string for many arguments? - C#

Question

I have the below method, which I need to check for whether the arguments are empty or null.

    public DB Where(string field, string operat, string value, s         


        

Answer 1

What I can suggest is this:

private string _nullChecker(string _value){
   if (string.IsNullOrWhiteSpace(_value))
            throw new ArgumentException(_value + "Cannot be null or be   empty");
   return _value;
}

then, in your Where string statement

_Where = " WHERE " + _nullChecker(field) + " " + __nullChecker(operat) + " @" + _nullChecker(field) + "1 " + _nullChecker(andOr) + " " + _nullChecker(field2) + " " + _nullChecker(operat2) + " @" + _nullChecker(field2) + "2 ";

Not sure with this though. Haven't checked it with actual code. :) Hope this helps